Device for operating brakes and brake-rods.



ilATENTED JAN. 1

G. W. BARL O W. DEVICE FOR OPERATING BRAKES-AND BRAKE RODS.

APPLIUATIOH FILED H5124, 1906.

UNITED sTArns n rEN'r OFFICE.

GEORGE W. BARLOW, OF SHREWSBURY, NEW JERSEY. DEVICE FOR OPERATING BRAKES AND BBAKE-RQDS.

Specification of Letters Patent.

Patented Jan. 1, 1907.

Application filed May 24. 1906. Serial No- 318.437.

To all whom it may concern:

Be it known that I, GEORGE W. BARLOW, a citizen of the United States, residing at Shrewsbury, in the county of Monmouth and State of New Jersey, have invented a new and useful Improvement in Devices for O crating Brakes and Brake-Rods, of which t e following is a specification.

My invention relates to devices for operating brakes and brake-rods applied to any form of vehicle, but especiallyto a vehicle of the automobile t e; and the object of my invention is to utilize the exhaust of the en gine on the way to the mufller or discharge as a means by the operation of which the brakes of such a vehicle may be actuated and ap lied with power to arrest its movement.

carrying out my invention the movement and force of the exhaust of the motorengine on its way to the discharge or to the Inuifler is passed through an ejector and employed to produce, to as great an extent as possible, a vacuum in a suitable tank to which the ejector is connected bya pipe, the line of which is interposed a check-valve against intermittent back pressure.

employ a cylinder for the piston of a brake-rod which is adapted to actuate a suitable brake device, there being around the said rodbetween one cylinder-head. and a collar a helical spring adapted to return the piston and rod to an initial position. This cylinder is actuated by a communicating pipe with a vacuum-chamber, and in the line of pipe is interposeda two-way valve.

The details of the construction and the operation are hereinafter more particularly described.

In the drawing I have represented my invention by a diagrammatic elevation and section.

areresentsa iefromane 'eb means hf which the e xhaust of the rii t dr-en gine is discharged. p

b is an ejector-body surrounding a portion of the ipe a, and reduced at one end and pro longe as a pipe a, which forms a substantial continuation of the pipe a, and c represents a inuflier or disc rge to which the pipe 0. is'connected.

d represents a vacuum-cylinder, and e e pipes extending from the ejector-body b to communication with the vacuum-tank d, and interposed between the pi es 0 e is a checkvalve f, so placed as to c ose against intermittent back pressure.

9 is a cylinder with cylinder-heads g 9 A piston h is movable within the cylinder, and a brake-rod '21, passing through the cylinder-head g, connects with the piston h. This cylinder-head g is provided Witha series of holes 2 3, openingup communication of the atmosphere Within the cylinder against one face of the piston h.

Surrounding the brake-rod i and between 'the center of the c linder-head g and a collar Z, pinned to t e brake-rod, is a helical spring k, the oiiice of which is to project the brake-rod and to draw the piston it toward the cylinder-head g.

Connected with the cylinder-heady is acured a two-way valve 0, and a pipe m ex- ,tends from the valve 0 to connection with the drawing the piston h, the brake-rod 'i, andthe ring are represented in-an initial 0- sitioh, the two-way valve 0 being turne so that the opening 4 therein permits the entrance of air through the pipe m to the opposite side of the piston h, so that the pressure of air is e ual on both sides of the piston, in which position the expansive action of the spring 7c operates to return the parts to the initial positionshown in the drawing.

The exhaust, from, the motorengine, Whether of steam or hot gases, passing pipe m. To the other end of this pipe is sethrough the pipe a on its way to the muffler or to the discharge creates a partial vacuum in the ejector-body b and pipe e, o ening the valve and drawing the air through the pipes e an from the tank (1. This exhaust usually comes in pulsations, and its action is therefore intermittent rather than constant, so that between the pulsationsit is possible, if they are not too ra id, for the check-valve f to close against back pressure which might be inthe pipe a and body I) of the e'ector. A very appreciable vacuum is thus e ected and maintained in the tank (1. When the valve 0 is turned so that. the passageway transversely thereof alines with the openings in the ip'es m m, connecting the tank d with the cy 'nder g, the vacuum therein at once acts upon the air in the m 'm/ to draw the same and produce a the atmospheric ings 2 3 to act upon the piston h, moving the same through the brake-rod t,

out of the cyhnder partial vacuum, permitting cylinder g and pipes pressure through the open- IIO cylinder, drawing'along the and at the same time compressing the spring 7c. The brake device may not only be thus a lied, but be held as applied for any reasonali e or desirable period. At the same time the operation of the ejector device is constant ly increasin the vacuum in the tank d.

When it is desire to release the brake device,

spring is by its ex ansion to move the piston i 71, along throu h t e c linder and project the rod so as to oosen t e brake device on its hold Wherever employed. In this latter position and as hereinbefore stated the exhaust keeps ri ht along, acting to produce the vacuum in t e tank (1, and at any time that the motor-engine sto s the check-valve f at once seats and holds t e vacuum.

While the device of my improvement is especially adapted for the operation of brake devices of vehicles, I do not limitmyself to such a plication, as the piston h and the rod imay e the medium of effecting the operation of some other devices. I

I claim as my invention 1. The combination with an exhaust-pipe from a motor-engine, an ejector and a dlS- charge-pipe therefrom, of a vacuum-tank, a pipe extending therefrom to the said ejector, a check-valve interposed in said line of pipe, a pi e from said vacuum-tank and a valve in the ine of pipe, a longitudinally-movable rod and devices interposed between the same and the latter pipe for moving said rod in opposite directlons.

2. The combination with an exhaust-pipe from a motor-engine, an ejector and a discharge-pipe therefrom, of a vacuum-tank, a pipe extending therefrom to the said ejector, a check-valve interposed in said line of pipe,

a pi e from said vacuum-tank and a valve in the ine of pipe, a cylinder connected with said pipe, a piston longitudinally movable in said 0 linder, a brake-rod passing through one cy inder-head and connected to said p1ston, and means for automatically returnin; said piston and rod to an initial position.

I 3. The combination with an QXhflllSt-Pllfl' from a motor-engine, an ejector and a discharge-pipe therefrom, of a vacuum-tank, a pipe extending therefrom to the said ejector. a check-valve interposed in said line of pipe, a pipe from said vacuum-tank and a valve in the line of pipe, a cylinder connected with said pipe, a piston longitudinally movable in said cylinder, a brake-rod passing through one cylinder-head and connected to said pis ton, a helical spring surrounding said rod outside of said cylinder, a collar secured to said rod beyond said sprin the adjacent cylindrical head being provi ed with a series of perforations.

4. The combination with an exhaust-pipe from a motor-enfgine, a muflier, and an interposed ejector, o a vacuum-tank, pipes connecting the ejector and vacuum-tank, a backpressure check-valve inserted in said line of pipe, a pipe extending from the vacuum-tank and a two-way valve having a perforation for the admission of air in its case interposed in said latter line of pipe, a longitudinallymovable rod and inter osed devices between the same and the said ine of pipe for moving said rod in op osite directions.

5. The combination with an exhaust-pipe from a motor-engine, a muflier, and an interposed ejector, of a vacuum-tank, pipes connecting the ejector and vacuum-tank, a back- 7 pressure check-valve inserted in said line of pipe, a pipe extending from the vacuum-tank and a two-way valve having a perforation for the admission of air in its case interposed in said latter line of pipe, a cylinder connect ed at one head with said latter line of pipe, the other head being rovided with series of perforations for the a mission of the atmosphere, a piston in said cylinder with said rod connected thereto'and extending through the cylinder-head having the perforation, a collar fastened to said rod and a helical spring between the collar and the piston-head having the perforations.

Signed by me this 21st day of May, 1906.

G. W. BARLOW. 

